Valve.



L. S. CHADWICK.

VALVE.

APPLICATION FILED DEC. 17. 1915.

1 2 163579 Patented Nov. 20, 1917.

UNITED STATEE PATENT @FFTEE LEE S. CHADWICK, OF EAST CLEVELAND, OHIO,ASSIGNOR TO THE CLEVELAND METAL PRODUCTS COMPANY, OF CLEVELAND, OHIO, ACORPORATION OF OHIO.

varivn fipeciflcation of Letters Patent.

Patented Nov. 1917.

Application filed December 17, 1915. Serial No. 67,849.

To all whom it may concern:

Be it known that 1, LEE S. Gmnwrcx, a citizen of the United States,residing at East Cleveland, in the county of Cuyahoga and State of Ohio,have invented a certain new and useful Improvement in Valves, of whichthe following is a full, clear, and exact description, reference beinghad to the accompanying drawings.

This invention relates to valves, and particularly to an improved valveconstruction that is especially suitable for use with that class ofliquid dispensing devices shown in my Letters Patent No. 1,137,574,issued April 27 1915. The invention has for its principal object tomaintain or increase the eiiiciency of the valves of the charactertherein shown, while greatly simplifying the construction, cheapeningthe manufacture, and increasing the durability of the valve.

Other objects attained through the peculiar design and construction ofthe valve will become apparent as this description advances; and now asl proceed to describe the invention by reference to' the accompanyingdrawing, I wish to be understood as not limiting myself to thestructural details illustrated therein, further than is required by theterms of the annexed claims, and is rendered necessary by the state ofthe prior art.

In the drawing, Figure 1 represents a fragmentary side elevation of adis ensing rece tacle having my improved va ve applie thereto; Fig. 2 isa vertical section through a distributing receptacle over which isinverted the dispensing receptacle of Fig. 1, the valve being shown insection, and .un-

' seated as is normal when thadispensing receptacle is in place; Fig. 3is an eniarged central section through the valve and neck.

of the receptacle, the valve being seated in this case, as if thedispensing receptacle were lifted from the distrlbuting receptacle; andFig, 4 shows the various elements of the valve in perspective.

The dispensing receptacle 1 has a neck 2 that is provided with anexternally threaded extension 3 to which may be applied the threadedcylindrical wall of the cap 4 of my improved valve. The cap is completedby an end wall that is divided into two concentrlc annular sections, theouter section ,5 preferably corresponding in shape to the end of theextension 3, which, in the present case, is straight, and the othersection 6 preferably made of an integral piece of sheet metal that isdrawn into a comparatively long and narrow cylindrical stem 11 that isflared at one end to constitute the frusto conical portion 12, and atthe other end, is reduced in diameter to form a rivet extension 13.Before the parts are assembled, the rivet'extension is entirelycylindrical, as shown in Fig. 4. The frusto conical portion of the valveis arranged to cooperate with the torus seat 6. By reason of thedifference in the radial sectional shape of the valve seat and theportion of the valve which cooperates therewith, only a line contact isobtained between the engaging portions. This has the advantage ofassuring a positive seating of the valve. If the two were of the sameradial section, and a particle of foreign matter should lodge betweenthe valve and its seat, it would unseat the valve practically its entirecircumference, and it will be seen that such a condition is quite likelyto exist where so much of the surfaces are intended for engagement. Inthe case of the torus valve seat, however, if any foreign substance isdeposited upon the seat or valve, in the vicinity of the line of contactbetween the two, the same will be wedged away from such line of contact,by reason of the surfaces receding therefrom. As far as the line contactis concerned, this might be accomplished by reversing conditions andmaking the valve seat substantially frusto conical, and the portion ofthe valve which cooperates therewith, substantially spherical. Such aconstruction, however, would have the disadvantage of allowing the valveto seat with the stem thereof at any angle with respect to the plane ofthe seat, because the line of contact on the valve would be absolutelycircular, regardless of the angular position of the valve stem. Invalves of the character herein shown, this would be a decideddisadvantage, for it would allow the dispensing receptacle to beinverted over the distributing receptacle with the valve stem turned somuch to one side that instead of the bottom of the distributingreceptacle engaging squarely on the end of the valve stem and forcingthe valve off its seat, it would be liable to strike more on the side ofthe valve stem and either fail to unseat it, or bend or otherwise injurethe valve. Therefore, I lay considerable importance upon making the,valve seat of torus formation, and the engaging portion of the valvefrusto conical, for, with such an arrangement, if the valve stem isinadvertently turned materially out of alinement with the longitudinalaxis of the dispensing receptacle, it will automatically right itselfbecause of the fact that when in any other position, the frusto conicalportion of the valve will present only two points of contact to thevalve seat, thereby allowing the spring to right the valve, the crosssection of the valve in the plane of such points of contact and parallelto the plane of the valve seat being elliptical rather than circular, aswas the case in the foregoing illustration of the spherical valve.

A cupped washer or abutment member 15 is applied to the rivet extension13 of the valve stem, and such extension is then u set or flattened, asshown clearly at 16, in Fig. 3, to securely hold the abutment member orwasher to the valve stem. A coil spring 17, preferably conical in shape,has its smaller end confined within the cupped washer 15, while itsopposite end reposes within the seat formed by the depressed outersurface of the valve seat or sectio 6 of the cap.

Having thus described my invention, what I claim is:

1. The combination of a valve having a substantially frusto conicalportion, a torus seat wherewith said portion of the valve is arranged tocooperate, the valve having an extension which projects through theseat, and the seat having a reverse side which aaesae constitutes anabutment for a spring, an 5 abutment carried by the aforesaid extension,and a spring confined between said abutments.

. 2. The combination of a. valve formed of sheet metal and comprising acylindrical neck having a flared substantially frusto conical portion atone end, an annular pressed metal seat wherewith the frusto conicalportion is arranged to cooperate, such seat being radially convexedtoward the aforesaid frusto conical portion, and means tending to movethe flared portion of the valve toward the seat.

3. The combination of a sheet metal valve comprising a cylindrical neckhaving a flared seat engaging portion at one end and a rivet extensionat the other, an abutment secured to said neck by such rivet extension,a pressed metal seat with one side of which the aforesaid portion of thevalve cooperates, and a spring confined between the reverse side of saidseat and the aforesaid abutment.

L The combination of a valve formed of sheet metal and comprising acylindrical neck having a flared substantially frusto conical portion atone end and a rivet extension at the other, an abutment member securedto the neck by said rivet extension, an annular pressed metal seatwherewith the frusto conical portion is arranged to cooperate, such seatbeing radially convexed toward the aforesaid frusto conical portion, anda spring interposed between the aforesaid abutment member and thereverse side of the valve seat.

5. The combination of an integral sheet metal valve comprising acylindrical neck having a rivet extension at one end and a flared frustoconical portion at the other, a. cupped washer secured to the stem bythe aforesaid rivet extension and having its open side presented towardthe aforesaid frusto conical portion of the valve, a pressed metal cuphaving an annular end wall that is radially convexed inward and throughwhich projects the stem of the valve, the

frusto conical portion whereof is arranged to cooperate with theaforesaid convexed portion, and a spring confined between the reverseside of such convexed portion and the aforesaid cupped washer.

6. The combination of an integral sheet metal valve comprising a neckhaving a rivet extension at one end and its opposite end flared toproduce a seat engaging por tion, a cupped washer secured to the neck bythe aforesaid rivet extension and having its open side presented towardthe aforesaid flared portion, a sheet metal seat with one surface ofwhich the aforesaid seat engaging portion of the valve is arranged tocooperate, and a spring interposed between the i seaeva reverse surfaceof said seat and the aforeaxes of the valve anti seat are maintainedsaid cupped washer. coincident with each other. 10 7. The combination ofa non yielding In testimony whereof, I hereunto aflix my torus valveseat, a valve having a substansignature in the presence of twowitnesses.

5 tially frusto conical portion for engagement LEE S. CHADWICK.

with said seat and capable of tilting with Witnesses: respect thereto,and means tending to force H. K. BELL,

the valve against the seat wherefore the H. B. McGlLL.

